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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-23 11:39:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-23 11:39:33 -0700 |
| commit | 131fbf4f9c096adadde27ad4bc70ea1632d720a4 (patch) | |
| tree | a76baf52612b90c4da8c4ac3c430d483fbbb1d79 /fs | |
| parent | f341d9f08ae01d90d8d0c135ae2edf4423e724c9 (diff) | |
| parent | e1699d2d7bf6e6cce3e1baff19f9dd4595a58664 (diff) | |
| download | linux-131fbf4f9c096adadde27ad4bc70ea1632d720a4.tar.gz linux-131fbf4f9c096adadde27ad4bc70ea1632d720a4.tar.bz2 linux-131fbf4f9c096adadde27ad4bc70ea1632d720a4.zip | |
Merge branch 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Zygo tracked down a very old bug with inline compressed extents.
I didn't tag this one for stable because I want to do individual
tested backports. It's a little tricky and I'd rather do some extra
testing on it along the way"
* 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: add missing memset while reading compressed inline extents
Btrfs: fix regression in lock_delalloc_pages
btrfs: remove btrfs_err_str function from uapi/linux/btrfs.h
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 3 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 14 |
2 files changed, 16 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 28e81922a21c..8df797432740 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1714,7 +1714,8 @@ static int __process_pages_contig(struct address_space *mapping, * can we find nothing at @index. */ ASSERT(page_ops & PAGE_LOCK); - return ret; + err = -EAGAIN; + goto out; } for (i = 0; i < ret; i++) { diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c40060cc481f..231503935652 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6709,6 +6709,20 @@ static noinline int uncompress_inline(struct btrfs_path *path, max_size = min_t(unsigned long, PAGE_SIZE, max_size); ret = btrfs_decompress(compress_type, tmp, page, extent_offset, inline_size, max_size); + + /* + * decompression code contains a memset to fill in any space between the end + * of the uncompressed data and the end of max_size in case the decompressed + * data ends up shorter than ram_bytes. That doesn't cover the hole between + * the end of an inline extent and the beginning of the next block, so we + * cover that region here. + */ + + if (max_size + pg_offset < PAGE_SIZE) { + char *map = kmap(page); + memset(map + pg_offset + max_size, 0, PAGE_SIZE - max_size - pg_offset); + kunmap(page); + } kfree(tmp); return ret; } |